@book { AGrammarofKusaal,
    title = "A Grammar of Kusaal",
    author = "Agoswin {Musah}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b14344",
    url = "https://www.peterlang.com/document/1056754"
}